JP2003027777A - Composite cylinder lock - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a new composite cylinder lock difficult to make picking. SOLUTION: A cam groove 13 is formed along a generator on the inside circumference of an outside cylinder in a position of an angle slipping approximately 90 degrees out of a tumbler locking groove 2 of a disc tumbler lock, a locking bar 14 extended along the generator of an inside cylinder 3, led in the direction of an radius on the circumference section of the inside cylinder 3 in a movable manner and energized with a direction projecting an outside edge to the outside, on the one hand, an unlocking notch 18 is formed in a side end edge of a tumbler 9 opposed to an inside edge of the locking bar 14, and when a duplicate key 7 is inserted into a key hole 5, the unlocking notch 18 of each of the tumblers is coordinated with the inside edge of the locking bar 14, and on the other hand, an imitative notch 19 is formed between a site opposed to the inside edge of the locking bar and the unlocking notch 18 in a state to insert no duplicate key into the key hole of the side end edge of at least one tumbler.

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a composite cylinder lock, and more particularly, to a novel composite cylinder lock capable of effectively preventing so-called picking. [0002] The present applicant has previously filed Japanese Patent Application No. 2001-16.
With 3294, a new composite cylinder lock was proposed. This composite cylinder lock is a composite cylinder lock in which the operating principle of a lever tumbler lock (rotary disc tumbler lock) is incorporated in a disk tumbler lock, and an outer cylinder having a tumbler locking groove formed along an inner peripheral surface on an inner peripheral surface. And an inner cylinder rotatably fitted with the outer cylinder, provided with a plurality of partition members laminated in the direction of the rotation axis at a predetermined interval, and having a keyhole penetrated along the axis of rotation. Each slot formed between the partition members of the inner cylinder is slidably guided in the width direction of the duplicate key inserted into the keyhole, and is provided in a direction engaging with the tumbler locking groove. Energized tumblers are inserted, and keyholes large enough to surround the keyholes are opened at different positions in the center of each tumbler, and the opening edges of the keyholes and the keyholes are opened. Into the keyway of the duplicate key A cam groove is formed along the generatrix of the inner peripheral surface of the outer cylinder at an angular position substantially shifted by 90 degrees from the tumbler engaging groove, wherein the edge of each tumbler is aligned with the shear line. A locking bar that extends along the generatrix of the inner cylinder, is guided movably in the radial direction at the outer periphery of the inner cylinder, and is urged in a direction in which the outer edge protrudes outward. ,on the other hand,
An unlock notch is formed at the side edge of the tumbler facing the inner edge of the locking bar, and when each of the tumblers is engaged with the corresponding keyway of the duplicate key inserted into the keyhole, the unlocking of each tumbler is performed. The notch is aligned with the inner edge of the locking bar, while the gap between the inner edge of the locking bar and the side edge of the tumbler is minimized when the inner cylinder is in the locked angular position. It is characterized by the following. [0004] The composite cylinder lock having the above-described structure is compared with a conventional disk tumbler lock.
It was confirmed that picking performance was remarkably improved. [0005] However, the gap between the inner edge of the locking bar and the side edge of the tumbler cannot be completely reduced to zero (0), and the elastic deformation of the members forming the tumbler and the cylinder lock, etc. When a torque is applied to the cylinder, the inner cylinder rotates slightly, which makes it difficult as compared with the conventional one, but does not completely disable the picking operation. Accordingly, an object of the present invention is to improve a composite cylinder lock having the above-described structure, and to propose a composite cylinder lock that makes picking difficult. SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides an outer cylinder having a tumbler locking groove formed on an inner peripheral surface along a generatrix, and rotatably fitted to the outer cylinder. A plurality of partition members stacked in the direction of the rotation axis at predetermined intervals, and an inner cylinder having a keyhole penetrated along the rotation axis, between the partition members of the inner cylinder. A tumbler is slidably guided in the width direction of the duplicate key inserted into the keyhole, and is urged in a direction engaging with the tumbler locking groove. At the center of the tumbler, a keyhole having a size capable of surrounding the keyhole is opened at a different position, and the opening edge of the keyhole and the keyway of the duplicate key inserted into the keyhole are opened. Engage to align the edges of each tumbler with the shear line A cam groove is formed along the generating line of the inner peripheral surface of the outer cylinder at an angular position substantially 90 degrees from the tumbler locking groove, and extends along the generating line of the inner cylinder in the cam groove; A side edge of the tumbler, which is guided so as to be movable in the radial direction at the outer peripheral portion and is urged in a direction in which the outer edge projects outward, while the tumbler faces the inner edge of the locking bar. An unlock notch is formed in each of the tumblers so that when each of the tumblers is engaged with the corresponding keyway of the duplicate key inserted through the keyhole, the unlock notch of each tumbler is aligned with the inner edge of the locking bar, On the other hand, at least one
A deceptive notch is formed between the side edge of each tumbler, the portion facing the inner edge of the locking bar in a normal state where the duplicate key is not inserted into the keyhole, and the unlocking notch. An embodiment of the present invention will be described below with reference to the drawings. In FIG. 1, reference numeral 1 denotes an outer cylinder, and tumbler locking grooves 2, 2 are provided on the inner peripheral surface of the outer cylinder 1 at two locations along the generatrix direction and symmetric with respect to the center axis of the outer cylinder 1. Is formed. The locking groove 2 shown in FIG. 1 is formed as an elongated notch which penetrates the outer cylinder 1 and opens on the outer peripheral surface of the outer cylinder. An inner cylinder 3 is rotatably fitted in the inner hole of the outer cylinder 1. The inner cylinder 3 in the illustrated embodiment has a shape in which, for simplicity of the drawing, for example, a cylindrical body is cut at a plurality of positions along a central axis thereof by milling. The inner cylinder 3 has a plurality of partition plates 4, 4 stacked in the central axis direction at predetermined intervals in a form of uncut portion. The keyhole 5 penetrates along the axis. Each of the plurality of slots 6, 6 formed between the partition plates 4, 4, is provided with a half key-shaped uncut portion and pins 11, 11 to be described later. An L-shaped locking piece 8 is integrally connected to one (lower) side edge of an elongated plate-like member guided so as to be movable in the width direction (the left-right direction in FIG. 1). Tumbler 9
Is inserted. The tumblers 9, 9 are urged in a direction in which one end (the left end in FIG. 1) is engaged with the tumbler locking groove 2 by the elastic force of a tumbler spring 10 as a compression coil spring. I have. At the center of each tumbler, FIG.
As shown in the figure, a keyhole 11 having a size surrounding the keyhole 5
Are opened at different positions in the key width direction, and when the duplicate key 7 is inserted into the keyhole 5, the keyway formed at the opening edge in the key width direction of the key through hole and the side edge of the duplicate key. And the edge of each tumbler 9 is aligned with the shear line (the cross-sectional line of the joint between the inner cylinder and the outer cylinder). In FIG. 1, reference numeral 12 denotes a pin. These pins 12 and 12 extend parallel to the center axis of the outer cylinder 1 and extend through the inner cylinder 3. These pins 12, 12 are connected to the tumbler 9
As a spring presser of the tumbler spring 10 for urging
Further, it functions as a normal position regulating member of the tumbler 9 and also functions as a guide member of the tumbler 9. The above-described structure is a structure of a conventionally known disk tumbler lock. In the present invention, in addition to the above structure, a composite cylinder lock having a structure of a so-called lever tumbler lock (rotary disk tumbler lock) is added. Is composed. That is, the cross-sectional shape is V at two locations along the generatrix of the inner peripheral surface of the outer cylinder at an angle position substantially 90 degrees from the tumbler locking groove 2 and symmetric with respect to the center axis of the outer cylinder 1. Formed cam grooves 13 are formed. Here, the angular position of the cam groove 13 is defined as the angular position of the cam groove bottom in the outer cylinder. The angular position of the tumbler locking groove 2 is
It is defined as a position that passes through the center axis O of the outer cylinder and where a line segment in the moving direction of the tumbler 9 intersects the outer cylinder. In the locked state (normal state), a locking bar 14 whose inner (upper in FIG. 1) cross-sectional shape is convex and whose lower side is V-shaped is engaged with the cam groove 13 in the locked state (normal state). The locking bar 14 is a rod extending substantially along the entire length of the inner cylinder 3 along the generatrix.
As shown in FIG. 2, a locking bar guide groove 1 having an inverted convex cross section formed on the outer peripheral portion of the inner cylinder along the generatrix.
5 and is movably guided in the radial direction of the inner cylinder. The partition plate 4 at the outer end and the inner end of the inner cylinder 3 is thicker than the other partition plates. A locking bar spring hole 16 is formed inside the partition plate 4 from the locking bar guide groove 15 side. It is drilled toward the center of the cylinder (see FIG. 2). A locking bar spring 17 as a compression coil spring is housed in the locking bar spring hole 16, and the outer edge of the locking bar 14 is outwardly moved by the elastic force of the locking bar springs 17. That is, it is urged downward in FIGS. 1 and 2. On the other hand, as shown in FIG. 1, an unlocking notch 18 is formed at the side edge of the tumbler 9 (in the embodiment shown, the side edge of the locking piece 8), and the duplicate key 7 is inserted into the key hole 5. Inserted,
The position of the unlocking notch is set such that the inner edge of the locking bar 14 aligns with the unlocking notch 18 when the edge of the tumbler 9 aligns with the shear line. Also, a portion of the side edge of at least one tumbler 9 which faces the inner edge of the locking bar 14 in a normal state where the duplicate key 7 is not inserted into the keyhole 5 (for example, a locking state), and an unlocking notch 18 In between, for example, unlock notch 18
A deceptive notch 19 of the same width as that of FIG. The deceptive notch 19 may be shallow. In the illustrated embodiment, the gap between the unlocking notch 18 and the deceptive notch 19 is small, so that they interfere with each other to form one wide notch. It becomes. In the composite cylinder lock according to one embodiment of the present invention having the above structure, when a regular duplicate key is inserted into a keyhole, both ends of the tumbler 9 are aligned with the shear line as shown in FIG. Then, the inner edge of the locking bar 14 comes to a position facing the unlocking notch 18 of the locking piece 8 so as to be engaged. If the inner cylinder 3 is turned through the duplicate key 7 in this state, the tumbler 9 having one end locked in the tumbler locking groove 2 becomes free, so that the inner cylinder can be rotated. At the same time, the relative rotation between the outer cylinder 1 and the inner cylinder 3 causes a wedge action between the cam groove 13 and the outer edge of the locking bar 14, and the locking bar 14 is pushed out of the cam groove 13. Move toward the center of the inner cylinder. At this time, since the inner edge of the locking bar 14 and the unlocking notch 18 of the locking piece are aligned as described above, the locking bar 14 and the cam are inserted into the unlocking notch 18 in a form. The interaction with the groove progresses,
Finally, the outer edge of the locking bar 14 rides on the inner peripheral surface of the outer cylinder 1. Thereafter, the rotation of the inner cylinder continues until the locking bar 14 rotates by 180 degrees and falls into the other cam groove 13, and when the inner cylinder 3 rotates by 180 degrees in this manner, a locking mechanism (not shown). Is activated to remove, for example, the dead bolt of the lock box from the strike. If the duplicate key is removed from the keyhole in this state, for example, the unlocking operation is completed. As described above, the operation of the composite cylinder lock according to the present invention is apparently the same as that of a normal disk tumbler lock. Further, by incorporating the rotary disk tumbler mechanism, the key difference does not increase. However, the composite cylinder lock according to the present invention makes so-called picking virtually impossible, as described below. That is, picking is performed by inserting a thin tool into the keyhole 5 and moving the tumbler in the longitudinal direction, for example, sequentially from the near side, applying torque to the inner cylinder 3 and unlocking the inner edge of the locking bar 14 with the unlocked notch. It is as if the tumbler is aligned to the unlocked position while confirming the feel when engaging the vehicle 18. However, in the composite cylinder lock according to the present invention, the tumbler 9 shown in FIG. 1 is deviated leftward during locking, and a torque is applied to the inner cylinder 3 during picking so that the inner edge of the locking bar 14 is notched. When the tumbler 9 is moved to the right while searching for the feeling of entering, when the inside edge of the locking bar 14 gets the feel of engaging with the notch 19, it is mistaken that the locking bar 14 is engaged with the unlocking notch 18. Therefore, at least one tumbler 9 is not moved to the unlocking position, and the end of the tumbler 9 remains in the tumbler locking groove 2, so that the inner cylinder is turned after the picking operation. However, the inner cylinder 3 does not rotate, and the picking fails after all. As is apparent from the above description, the present invention relates to an inner edge of a locking bar in a normal state where a duplicate key is not inserted into a keyhole at a side edge of at least one tumbler of a composite cylinder lock. Because the cheating notch is formed between the part opposite to the opening and the unlocking notch, the inner edge of the locking bar is aligned with the cheating notch during picking, thus making it impossible to pick. The effect of the period. Further, since the locking bar and the cam groove of the outer cylinder constitute a click device, the angular position of the inner cylinder when the duplicate key is inserted is strictly determined, and the free movement of the inner cylinder and the outer cylinder is eliminated. In addition, the usability is improved, the gap between the end of the tumbler and the tumbler locking groove can be reduced, and various effects such as improvement in accuracy of the tumbler lock can be achieved.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a cross-sectional view of a slot portion of a composite cylinder lock according to an embodiment of the present invention. FIG. 2 is a transverse sectional view of a partition plate portion similar to FIG. [Description of Signs] 1 outer cylinder 2 tumbler locking groove 3 inner cylinder 4 partition plate 5 key hole 6 slot 7 duplicate key 8 locking piece 9 tumbler 10 tumbler spring 11 key through hole 12 pin 13 cam groove 14 locking bar 15 locking bar guide Groove 16 Locking bar spring hole 17 Locking bar spring 18 Unlocking notch 19 Deceptive notch

Claims (1)

Claims: 1. An outer cylinder having a tumbler locking groove formed on an inner peripheral surface thereof along a generatrix, and rotatably fitted to the outer cylinder and maintaining a predetermined interval in a direction of a rotation axis. A plurality of laminated partition members are provided, and an inner cylinder having a keyhole penetrated along the axis of rotation is provided.Each slot formed between the partition members of the inner cylinder has a keyhole. A tumbler guided slidably in the width direction of the inserted key and urged in a direction engaging with the tumbler locking groove is inserted, and a central portion of each tumbler surrounds the key hole. The keyholes of the size obtained are opened at different positions, and the opening edge of the keyhole and the keyway of the duplicate key inserted into the keyhole are engaged, and the edge of each tumbler is aligned with the shear line. An angle of about 90 degrees from the tumbler locking groove. To form a cam groove along a generatrix of the outer cylinder circumference of the location,
A locking bar that extends along the generatrix of the inner cylinder, is guided in the outer peripheral portion of the inner cylinder so as to be movable in the radial direction, and is urged in a direction in which the outer edge protrudes outward, When the tumbler is engaged with the corresponding keyway of the duplicate key inserted through the keyhole by forming an unlocking notch at the side edge of the tumbler opposite to the inner edge of the locking bar. The unlocking notch of each tumbler aligns with the inner edge of the locking bar, while the side edge of at least one tumbler opposes the inner edge of the locking bar in a normal state where the duplicate key is not inserted into the keyhole A composite cylinder lock, wherein a deceptive notch is formed between the unlocking notch and the unlocking notch.